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<?php $a = array('one', 'two'); $b = array('two'); $c = array_diff($one, $two); $c[] = 'three'; var_dump($c);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Warning: Undefined variable $one in /in/fj1tC on line 5 Warning: Undefined variable $two in /in/fj1tC on line 5 Fatal error: Uncaught TypeError: array_diff(): Argument #1 ($array) must be of type array, null given in /in/fj1tC:5 Stack trace: #0 /in/fj1tC(5): array_diff(NULL, NULL) #1 {main} thrown in /in/fj1tC on line 5
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Warning: Undefined variable $one in /in/fj1tC on line 5 Warning: Undefined variable $two in /in/fj1tC on line 5 Fatal error: Uncaught TypeError: array_diff(): Argument #1 ($array) must be of type array, null given in /in/fj1tC:5 Stack trace: #0 /in/fj1tC(5): array_diff(NULL, NULL) #1 {main} thrown in /in/fj1tC on line 5
Process exited with code 255.
Output for 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: one in /in/fj1tC on line 5 Notice: Undefined variable: two in /in/fj1tC on line 5 Warning: array_diff(): Expected parameter 1 to be an array, null given in /in/fj1tC on line 5 array(1) { [0]=> string(5) "three" }
Output for 7.3.32 - 7.3.33
Warning: array_diff(): Expected parameter 1 to be an array, null given in /in/fj1tC on line 5 array(1) { [0]=> string(5) "three" }
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33
Notice: Undefined variable: one in /in/fj1tC on line 5 Notice: Undefined variable: two in /in/fj1tC on line 5 Warning: array_diff(): Argument #1 is not an array in /in/fj1tC on line 5 array(1) { [0]=> string(5) "three" }

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